Advanced Fiber Materials, Volume. 6, Issue 4, 00413(2024)

Constructing “π–π” Reinforced Bridge Carbon Nanofibers with Highly Active Co-N/C@pyridine N/C@CNTs Sites as Free-Standing Bifunctional Oxygen Electrodes for Zn–Air Batteries

Tuo Lu1... Nengneng Xu1,*, Liyuan Guo1, Benji Zhou1, Lingyu Dai1, Woochul Yang3, Guicheng Liu4, Joong Kee Lee5, and Jinli Qiao12,** |Show fewer author(s)
Author Affiliations
  • 1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials and College of Environmental Science and Engineering, Donghua University, Shanghai 201620, People’s Republic of China
  • 2Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, People’s Republic of China
  • 3Department of Physics, Dongguk University, Seoul 04620, Republic of Korea
  • 4School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, People’s Republic of China
  • 5Energy Storage Research Center and Clean Energy Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
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    Rechargeable Zn–air batteries (ZABs) have received extensive attention, while their real applications are highly restricted by the slow kinetics of the oxygen reduction and oxygen evolution reactions (ORR/OER). Herein, we report a “bridge” structured flexible self-supporting bifunctional oxygen electrode (CNT@Co-CNFF50-900) with strong active and stable Co-N/C@pyridine N/C@CNTs reaction centers. Benefiting from the electron distribution optimization and the advantages of hierarchical catalytic design, the CNT@Co-CNFF50-900 electrode had superior ORR/OER activity with a small potential gap (ΔE) of 0.74 V. Reinforced by highly graphitized carbon and the “π–π” bond, the free-standing CNT@Co-CNFF50-900 electrode exhibited outstanding catalytic stability with only 36 mV attenuation. Impressively, the CNT@Co-CNFF50-900-based liquid ZAB showed a high power density of 371 mW cm-2, a high energy density of 894 Wh kg-1, and a long cycling life of over 130 h. The assembled quasi-solid-state ZAB also demonstrated a high power density, attaining 81 mW cm-2, with excellent charge–discharge durability beyond 100 h and extremely high flexibility under the multi-angle application. This study provides an effective electrospinning solution for integrating high-efficiency electrocatalysts and electrodes for energy storage and conversion devices.

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    Tuo Lu, Nengneng Xu, Liyuan Guo, Benji Zhou, Lingyu Dai, Woochul Yang, Guicheng Liu, Joong Kee Lee, Jinli Qiao. Constructing “π–π” Reinforced Bridge Carbon Nanofibers with Highly Active Co-N/C@pyridine N/C@CNTs Sites as Free-Standing Bifunctional Oxygen Electrodes for Zn–Air Batteries[J]. Advanced Fiber Materials, 2024, 6(4): 00413

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    Paper Information

    Category: Research Articles

    Received: Dec. 6, 2023

    Accepted: Mar. 26, 2024

    Published Online: Nov. 14, 2024

    The Author Email: Xu Nengneng (nengnengxu@dhu.edu.cn), Qiao Jinli (qiaojl@dhu.edu.cn)

    DOI:10.1007/s42765-024-00413-9

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